''It's like a merino fleece. If you get a coarser micron it can add prickle factor and no-one wants to wear that in their garment.''
She said it was Valentino's sixth national supreme champion ribbon and his second fleece title, having been the supreme champion huacaya alpaca four times.
The couple has now won nine titles altogether, the most for a huacaya alpaca breeder in the history of the competition.
Valentino's fleece also won ribbons for champion veteran male fleece and champion white fleece.
The Stracks won eight champion ribbons altogether at this month's national expo.
Stoneleigh Drama Queen, sired by Valentino, won champion adult female huacaya and champion white huacaya and has been sold to a breeder in Britain.
At the other end of the age scale, the supreme champion huacaya alpaca ribbon went to Banks Peninsula couple Frank and Anya Walkington for their junior male Shamarra Diesel, while the top suri alpaca and fleece ribbons were won by North Island alpacas.
Diesel also won champion junior and champion mid/dark fawn huacaya male.
Kaiapoi couple Kit and Sheryl Johnson won nine champion ribbons across the animal and fleece sections for the huacaya alpacas, while in the suri section West Melton couple Sheryl and Lindsay Riddle won 10 champion ribbons and Temuka couple Anne and Neil Godfrey took home five.
-By David Hill